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Solid-state high-throughput screening for color tuning of electrochromic polymers.

Fahad Alhashmi Alamer¹, Michael T Otley, Yujie Ding

¹Department of Physics, University of Connecticut, 97 N. Eagleville Rd. Storrs, CT, USA, 06269.

Advanced Materials (Deerfield Beach, Fla.)

|September 17, 2013

Summary

Researchers developed a novel method for creating solid-state electrochromic devices using monomer diffusion and oxidative copolymerization. This technique allows for tunable colors, excluding black and green, with a unique transmissive sky blue in the bleached state.

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Area of Science:

Materials Science
Polymer Chemistry
Electrochemistry

Background:

Solid-state gel electrolytes offer a stable platform for electrochromic devices.
Conjugated copolymers with single visible absorption bands are key to tunable coloration.
Controlling monomer feed ratios is crucial for achieving desired optical properties.

Purpose of the Study:

To develop a method for precisely controlling monomer feed ratios in solid-state copolymerization.
To create solid-state electrochromic devices with a wide range of achievable colors.
To investigate the relationship between monomer composition and the resulting copolymer color.

Main Methods:

Utilizing diffusion of two monomers within a solid-state gel electrolyte.
Employing oxidative copolymerization to form conjugated polymers.

Keywords:

color tuning conjugated polymer diffusion electrochromic high-throughput screening

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Fabricating solid-state electrochromic devices based on the synthesized copolymers.

Main Results:

Achieved precise control over monomer feed ratios through diffusion-controlled polymerization.
Generated solid-state electrochromic devices capable of displaying various colors (excluding black and green).
Demonstrated that bleached devices transition to a transmissive sky blue color.

Conclusions:

The diffusion-controlled oxidative copolymerization method effectively tunes the color of solid-state electrochromic devices.
This approach offers a versatile route to custom-colored electrochromic materials.
The resulting devices exhibit a distinct and consistent bleached state color.